Problems with Portfolio page. Please Help!

I’m in process of building my Portfolio page.

Link to my portfolio: SoyckAS

Attention to " These are some of my projects" section.
I cant understand why if i add text below project-image, width of all images in a row getting smaller.

Please help, im stuсk.

Thank you.

Can somebody help with solution?

I see that aspect ratio changed after i add some text to my “p” element below image, but i dont understand why…